diff --git a/contours/Makefile b/contours/Makefile
index 14b4547..6530379 100644
--- a/contours/Makefile
+++ b/contours/Makefile
@@ -39,9 +39,11 @@ all.xyz: $(XYZ)
 .INTERMEDIATE: $(XYZ)
 %.xyz: %.zip
 	unzip -qq -c $< $@ | \
+		sed -e 's/^ \+//' -e 's/ \+/,/g' | \
 		./clip.awk $(addprefix -v ,$(BOUNDS)) | \
 		$(SORT) > $@
 
 db/.ready: managedb
+	mkdir -p db
 	./managedb start
 	touch $@